... square tubes,rectangular tubes,I-beams,e GRP Guarddrail1) The GRP Guarddrail is mainly assembled with FRP ... ,rectangular tubes,I-beams,etc.2) The GRP Guarddrail can be connected with stainless steel screws ... 20 years without painting every year,almost free of maintenance charge. They have various warm colors ... can design and produce other kinds of GRP Guarddrailaccording to customer's requirements ...